QED effects induced harmonics generation in extreme intense laser foil interaction

J Y Yu, T Yuan, W Y Liu, M Chen, W Luo, S M Weng, Z M Sheng

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Abstract

A new mechanism of harmonics generation (HG) induced by quantum electrodynamics (QED) effects in extreme intense laser foil interaction is found and investigated by particle-in-cell (PIC) simulations. When two laser pulses with identical intensities of 1.6 × 1024 W cm-2 are counterincident on a thin foil target, harmonics emission is observed in their reflected electromagnetic waves. Such harmonics radiation is excited due to transversely oscillating electric currents coming from the vibration of QED effect generated e-e+ pairs. The effects of laser intensity and polarization were studied. By distinguishing the cascade depth of generated photons and pairs, the influence of QED cascades on HG was analyzed. Although the current HG is not an efficient way for radiation source applications, it may provide a unique way to detect the QED processes in the near future ultra-relativistic laser solid interactions.

Original languageEnglish
Article number044011
Number of pages7
JournalPlasma Physics and Controlled Fusion
Volume60
Issue number4
Early online date28 Feb 2018
DOIs
Publication statusPublished - 30 Apr 2018

Keywords

  • laser plasma interaction
  • PIC simulation
  • QED plasma

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